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Std edition HS402 DIY Oscilloscope V1.7
Profile：HS402 is an USB Oscilloscope working with STM32F411 development board.
License: CERN Open Hardware License
Description
A 2 Channel DIY Oscilloscope based on STM32F4x1 Black Pill development board. It provide long memory buffer and high real-time transfer speed. As the HS10X series it keep the best ratio performance/cost/ease to build.
Power consumption is also one of the lowest in the market (~40mA). It can be used only with [HScope app](https://play.google.com/store/apps/details?id=com.martinloren.hscope) for Android.
**Other**
[Official project page](https://www.martinloren.com/hs40x-diy-oscilloscopes/)
**Disclaimer**
This is an old version of the PCB board. Please check on [Github](https://github.com/martinloren/HScope/tree/master/HS402) the latest v2.0 or v3.0.
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | BAV99 | D1,D2 | SOT23-3 | 2 |
| 2 | 20pF var | C1,C5 | C1210 | 2 |
| 3 | 910K | R2,R6 | C0805 | 2 |
| 4 | MCP6S21 | U1,U3 | SOP-8_L4.9-W3.9-P1.27-LS6.0-BL | 2 |
| 5 | 100K | R3,R7 | C0805 | 2 |
| 6 | 47pF | C3,C7 | C0805 | 2 |
| 7 | BNC | P2,P5 | BNC_SOCKET_TYCO-AMP | 2 |
| 8 | 100nF | C2,C6,C4 | C0805 | 3 |
| 9 | AQY210EH | K1,K2 | AQY210 SDIP-4 | 2 |
| 10 | 1K | R1,R5,R8 | C0805 | 3 |
| 11 | Header 4 | OUT | HDR1X4 | 1 |
| 12 | Header 5 | IN | HDR1X5 | 1 |
| 13 | REF2033 | U4 | SOT23-5 | 1 |
| 14 | AMS1117-1.2 | U2 | SOT-223_L6.5-W3.5-P2.30-LS7.0-BR | 1 |
| 15 | 1K | R9 | VR5 | 1 |
| 16 | 47uF | C8 | C0805 | 1 |
| 17 | 470nF | C9 | C0805 | 1 |
| 18 | Header 2 | SP,PWM | HDR-F-2.54_1X2 | 2 |
| 19 | STM32 BlackPill STM32F411 MIN PINS | MCU | STM32F411 BLACKPILL USB-C REDUCED PINS | 1 |
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